300 days). Despite these apparent problems, it is possible to obtain reasonably close agreement between the performance of steam deactivated and equilibrium catalysts. It is also recognized that it is possible to steam deactivate a catalyst so that its properties and performance poorly represent the equilibrium. It is therefore recommended that when assessing the performance of different catalyst types, a common steaming condition be used. Catalyst deactivation by metals deposition is not addressed in this guide.1.4 This guide offers two approaches to steam deactivate fresh catalysts. The first part provides specific sets of conditions (time, temperature and steam pressure) that can be used as general pre-treatments prior to comparison of fresh FCC catalyst MAT activities (Test Method D 3907) and selectivities.1.4.1 The second part provides guidance on how to pretreat catalysts to simulate their deactivation in a specific FCCU and suggests catalyst properties which can be used to judge adequacy of the simulation. This technique is especially useful when examining how different types of catalyst may perform in a specific FCCU, provided no other changes (catalyst addition rate, regenerator temperature, contaminant metals levels, etc.) occur. This approach covers catalyst physical properties that can be used as monitors to indicate the closeness to equilibrium catalyst properties.1.5 The values stated in SI units are to be regarded as standard. The values given in parentheses are provided for information only.1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use." >

ASTM D4463-96(2001)
淡水分裂催化剂的金属自由蒸汽去活化作用标准指南

Standard Guide for Metals Free Steam Deactivation of Fresh Fluid Cracking Catalysts


 

 

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标准号
ASTM D4463-96(2001)
发布
1996年
发布单位
美国材料与试验协会
替代标准
ASTM D4463-96(2006)
当前最新
ASTM D4463/D4463M-19
 
 
1.1 本指南涵盖了在微活性测试 (MAT) 中测定催化裂化活性之前通过水热处理对新鲜的流化催化裂化 (FCC) 催化剂进行失活。 1.2 在 MAT 之前对新鲜的 FCC 催化剂进行水热处理重要的是，催化剂在新鲜状态下的催化活性不足以衡量其真实的商业性能。在商业裂化装置的运行过程中，催化剂会因热、水热和化学降解而失活。因此，为了保持催化活性，将新鲜催化剂（...

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